Determination of glass transition temperature
Glass transitions occur in all non-crystalline or semicrystalline materials and lead to significant changes in material properties such as thermal expansion, the specific heat capacity or modulus. Because the glass transition is very sensitive to chemical and physical structure, it can be used to characterize materials and is therefore important in most industries.
Thermal Analysis provides different methods to measure the glass transition and the glass transition temperature.
In this Webinar, we will discuss the basic theory of the glass transition and the different thermal analysis techniques and methods used to measure the glass transition and the associated glass transition temperature.
The determination of glass transition temperature (Tg) is critical for understanding a material's properties. It indicates the temperature at which a substance transforms from a glassy state to a rubbery state or vice versa. The formation of such amorphous glasses is a universal phenomenon observed in practically all materials.
For practical applications, it is important to realize that the properties of glasses differ significantly from those of other solids. For example, the solubility of glasses is higher than for crystals; this influences the biological activity of pharmaceutical substances.
Why is the determination of glass transition temperature so important?
The glass transition provides information about molecular dynamics in the supercooled melt. It defines the upper temperature limit for the use of solid amorphous materials; for rubbery materials, it is the lower temperature limit.
Knowledge of the glass transition is also important for optimizing production parameters and the properties of products. In addition, the glass transition can be used to identify and compare materials and is therefore important for quality assurance and failure analysis